My tipp for that would be one of those underwater compacts, or the Nikon 1 AW 1 with the corresponding lens 11-27.5mm f/3.5-5.6 (approx 30-75mm full frame equivalent). They are the most robust cameras you can buy right now.
Remember though that lenses are made of GLAS. So yeah, theres usually a limit to what kind of beating they can take. Though there are especially robust variants of glas such as Gorilla glas, I am not aware anyone uses these kinds of glas to produce unkillable lenses.